A learning environment for defending both information systems and the operational technology that runs physical infrastructure. Covers the CIA triad and defense-in-depth, the NIST Cybersecurity Framework and IEC 62443, network segmentation, identity & access management, zero trust, the SOC and incident response — from IT security through to OT/ICS.
Built for security engineers, network and controls engineers, SOC analysts, and IT/OT professionals working across enterprise, industrial, and critical-infrastructure environments.
Interactive security tools — assess your NIST CSF maturity, audit firewall rulesets, and design secure OT/IT network architectures.
Rate your organization's cybersecurity maturity across all 6 NIST CSF 2.0 functions (Govern, Identify, Protect, Detect, Respond, Recover). Live radar chart, per-function scores, gap analysis, maturity tier badge, and exportable report.
Build a firewall ACL and detect conflicts, shadowed rules (rules that will never fire), overly permissive ANY→ANY entries, and missing default-deny. Works with any firewall policy — Cisco, pfSense, FortiGate, and OT firewalls.
Design OT/ICS network segmentation with the Purdue model and IEC 62443 zones & conduits — managed switch placement, VLAN/firewall boundaries, an Industrial DMZ and data diode, and a bill of materials.
Plan an enterprise network with a security framework — segmentation, firewalls, and a starting-point compliance checklist referencing NIST CSF, PCI-DSS, and SOC 2.
Plan IP subnets and VLAN boundaries — the groundwork for network segmentation, one of the most effective defensive controls.
Design redundant, resilient network topologies that protect availability — the priority security goal in OT environments — against link failures and disruption.
Select the 8 CVSS v3.1 base metrics and get the exact base score, severity rating, and vector string, computed with the official FIRST.org formula.
Interactive 3D SCADA system — explore the OT/IT DMZ, jump hosts, and the segmentation that defends industrial control networks from the corporate side.
Animated industrial Ethernet topology showing Purdue model zone boundaries, ring redundancy (DLR/MRP), and protocol traffic flows across managed switches.
Cybersecurity is a certification-driven field. This overview maps the credentials that matter across the career — vendor-neutral foundations (CompTIA), senior management certs (ISC2, ISACA), offensive/ethical-hacking certs, and the OT/ICS-specific certifications (ISA/IEC 62443) — what each covers, who runs it, and how they ladder.
CompTIA Security+ prep: threats & vulnerabilities, cryptography, IAM, secure architecture, operations, and GRC — the field’s standard entry cert.
CompTIA CySA+ prep: behavioral analytics, SOC operations, vulnerability management, threat intel, and incident response.
CompTIA PenTest+ prep: scoping, recon, vulnerability scanning, exploitation, and professional reporting for penetration testers.
CISSP prep: the eight (ISC)² domains — risk management, security architecture, network security, IAM, security operations and more.
CISM prep: governance, risk management, building and running a security program, and incident management — for security managers.
CISA prep: IS auditing, IT governance, systems acquisition, operations/resilience, and protecting information assets.
OSCP prep: the legendary 24-hour hands-on exam — enumeration, exploitation, privilege escalation, AD attacks, and reporting.
CEH prep: the ethical-hacking attack lifecycle — recon, scanning, exploitation, web/wireless attacks, and malware concepts.
ISA/IEC 62443 certificate prep: the OT-security standard itself — zones & conduits, security levels, and risk assessment.
Cisco CyberOps Associate prep: security concepts, monitoring data types, host-based analysis, packet-level intrusion analysis, and IR/forensics basics for SOC roles.
Interactive 12-section cybersecurity reference covering NIST CSF 2.0, IEC 62443, CIA triad for OT/ICS, network security, identity management, cryptography, vulnerability management, incident response, and NERC CIP compliance.
Why a door's failure mode on power loss is a deliberate design decision, not an accident — fail-safe unlocks for life safety, fail-secure stays locked for asset protection, and real buildings use both.
Why "inside the network" stopped meaning "safe" — the castle-and-moat model trusts anything past the boundary, enabling lateral movement after a single breach; zero trust verifies every request, at every resource, every time.
Three data transformations that get constantly mixed up — encoding is a keyless, publicly reversible format conversion with zero confidentiality, encryption reverses only with a secret key, and hashing is deliberately one-way.
"Who are you?" is a completely different question from "what can you do?" — a successful login only confirms identity; what that identity is allowed to touch is a separate permissions check, every time.
Three words used as near-synonyms and treated as one — a vulnerability is a weakness, a threat is a potential source of harm, and risk is what you get only when both converge with real consequence.
Why one only tells you about the attack and the other can stop it mid-flight — an out-of-band IDS sees only a copy of traffic and can just alert, while an in-line IPS sits in the real data path and can block in real time.
One identical key for both directions, fast but hard to distribute safely, versus a public/private key pair that solves distribution at the cost of speed — real systems like TLS use both together, not either alone.
Two opposite default postures — blacklisting allows everything except known-bad items and is reactive by nature, while whitelisting blocks everything except pre-approved items, closing the zero-day gap at the cost of constant upkeep.
A scanner automatically checks known signatures and hands back a flat list of potential weaknesses — a pen tester manually chains those same findings into a real foothold-to-domain-compromise attack path. A clean scan never means "secure."
Patch management is one remediation mechanism — deploying vendor updates. Vulnerability management is the full discover-assess-prioritize-remediate-verify lifecycle, which is why "we patch on schedule" never covers unpatchable, EOL, or config/design flaws.
Red team isn't just "pentest with a cooler name" — it's objective-based adversary emulation, usually unannounced, that tests the blue team's real detection and response. Purple team is the deliberate loop that turns both exercises into measurable defense improvements.
A false positive costs an analyst ten minutes — a false negative lets an attacker operate with zero resistance. And a chronically noisy alert doesn't stay harmless: alert fatigue quietly converts a high false-positive rate into missed real attacks.
Blocking a malicious hash or IP costs an attacker minutes to rotate. Detecting their actual Tactics, Techniques & Procedures costs them a retool — the pyramid-of-detection-value reason "we blocked the IoC" rarely means the campaign is stopped.